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Title: Decoherence and spin echo in biological systems

Abstract

The spin-echo approach is extended to include biocomplexes for which the interaction with dynamical noise, produced by the protein environment, is strong. Significant restoration of the free induction decay signal due to homogeneous (decoherence) and inhomogeneous (dephasing) broadening is demonstrated analytically and numerically for both an individual dimer of interacting chlorophylls and for an ensemble of dimers. Here, our approach does not require the use of small interaction constants between the electron states and the protein fluctuations. It is based on an exact and closed system of ordinary differential equations that can be easily solved for a wide range of parameters that are relevant for bioapplications.

Authors:
 [1];  [2]
  1. Univ. de Guadalajara, Jalisco (Mexico). Dept. de Fısica, CUCEI
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1454986
Alternate Identifier(s):
OSTI ID: 1179714
Report Number(s):
LA-UR-15-20113
Journal ID: ISSN 1539-3755; PLEEE8; TRN: US1901184
Grant/Contract Number:  
AC52-06NA25396; 15349
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 5; Journal ID: ISSN 1539-3755
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Biological Science; Mathematics

Citation Formats

Nesterov, Alexander I., and Berman, Gennady Petrovich. Decoherence and spin echo in biological systems. United States: N. p., 2015. Web. doi:10.1103/PhysRevE.91.052702.
Nesterov, Alexander I., & Berman, Gennady Petrovich. Decoherence and spin echo in biological systems. United States. doi:10.1103/PhysRevE.91.052702.
Nesterov, Alexander I., and Berman, Gennady Petrovich. Thu . "Decoherence and spin echo in biological systems". United States. doi:10.1103/PhysRevE.91.052702. https://www.osti.gov/servlets/purl/1454986.
@article{osti_1454986,
title = {Decoherence and spin echo in biological systems},
author = {Nesterov, Alexander I. and Berman, Gennady Petrovich},
abstractNote = {The spin-echo approach is extended to include biocomplexes for which the interaction with dynamical noise, produced by the protein environment, is strong. Significant restoration of the free induction decay signal due to homogeneous (decoherence) and inhomogeneous (dephasing) broadening is demonstrated analytically and numerically for both an individual dimer of interacting chlorophylls and for an ensemble of dimers. Here, our approach does not require the use of small interaction constants between the electron states and the protein fluctuations. It is based on an exact and closed system of ordinary differential equations that can be easily solved for a wide range of parameters that are relevant for bioapplications.},
doi = {10.1103/PhysRevE.91.052702},
journal = {Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics},
number = 5,
volume = 91,
place = {United States},
year = {2015},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

FIG. 1 FIG. 1: Time dependence (in ps) of $m$ = |〈m(t)〉|, for the FI signal. Blue curves: analytical results. Dashed curves: exact solution. Parameters: Ω = 127, θ = 0.968, γ = 10, v = 20 (red curve), v = 40 (orange curve). Inset: θ = 1.45, v = 20.

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.